/Engine/Plugins/Online/OnlineSubsystemUtils/Source/OnlineSubsystemUtils/Public/PartyBeaconHost.h
Attempts to remove a party reservation from the beacon
virtual [EPartyReservationResult::Type](API\Plugins\OnlineSubsystemUtils\EPartyReservationResult__Type) RemovePartyReservation ( const [FUniqueNetIdRepl](API\Runtime\Engine\GameFramework\FUniqueNetIdRepl) & PartyLeader )